SUMMARY
A survey of the fish species of the Mogol and Palala Rivers (Limpopo System) was conducted during 1979 and 1981. Thirty one indigenous fish species were sampled in the Mogol River, five of which were recorded for the first time in this river. The Palala River contained twenty seven indigenous fish species, twelve-of which were not previously listed for this river. The results of this survey are discussed in relation to previous work conducted on the fish species of the north-western Transvaal tributaries of the Limpopo River.